Socket 479

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Socket 479

Type	PGA-ZIF
Chip form factors	Flip-chip pin grid array (FC-PGA2)
Contacts	479
FSB protocol	AGTL+
FSB frequency	100 MHz (Quadpumped), FSB400 133 MHz (Quadpumped), FSB533
Processors	Intel Pentium M Intel Celeron M VIA C7-M
This article is part of the CPU socket series

Socket 479 is the CPU socket for the Intel Pentium M and Celeron M, mobile processors. Normally used in laptops, but has also been used with Tualatin-M Pentium III processors. The official naming by Intel is mFCPGA and mPGA479M. Despite the 479 in the name the Pentium M Processors for this socket use only 478 Pins.

[edit] Technical Specifications

This socket is similar to, but different from the Socket 478. The Socket 479 has a different electrical pin-arrangement from socket 478, making it impossible to use a Pentium M in a normal 478 board, but the Pentium M fits mechanically in a Socket 478. For this reason manufacturers like Asus have made drop-in boards (e.g. CT-479) which lets you use socket 479 processors^[1].

Chipsets which employ this socket for the Pentium M are the Intel 855GM/GME/PM, Intel 915GM/GMS/PM and Intel 6300ESB. While the Intel 855GME chipset supports all Pentium M CPU's, the Intel 855GM chipset does not support 90nm 2MB L2 cache (Dothan core) models^[2]. The other main difference is that the 855GM chipset has its graphics core at 200MHz while the 855GME is up to 250MHz.

Asus CT-479 adapter	A comparison of the Dothan (Pentium M SL7SM) (left) and Yonah (Core Duo) (right). Both chips have 478 pins, but the placement of one pin has been changed.

Recently, Intel has released a new socket 479 with a revised pinout for its Core processor, called Socket M. This socket has the placement of one pin changed from the original Socket 479 in order to make the different processors incompatible in the incorrect socket. Socket M supports a 667 MT/s front side bus with the Intel 945PM/945GM chipsets.

[edit] See also

• List of Intel microprocessors
• List of Intel Pentium M microprocessors
• List of Intel Celeron microprocessors

[edit] References

1. ^ ASUS CPU Adaptor Brings Quiet and Cool Performance of Notebook Processor to Desktop Computing
2. ^ Intel 855GM/855GME Chipset Platform Design Guide

v • d • e Intel CPU sockets and slots Desktop sockets Slot 1 • Socket 370 • Socket 423 • Socket 478 • Socket N • LGA 775 • Socket H • LGA 1366 Mobile sockets Socket 441 • Socket 479 • Socket 495 • Socket M • Socket P Server sockets Socket 8 • Slot 2 • Socket 603 • Socket 604 • PAC418 • PAC611 • Socket J • Socket N • Socket B Legacy non-proprietary sockets Socket 1 • Socket 2 • Socket 3 • Socket 4 • Socket 5 • Socket 6 • Socket 7